Berlin 2001 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 18: Poster: Polymer Blends, Heterogeneous Systems, Colloids and Nanoparticles, Interfaces, Polyelectrolytes
CPP 18.30: Poster
Mittwoch, 4. April 2001, 12:30–15:00, AT1
Interdiffusion in a Particle-Matrix System of Two Miscible Polymers: An Investigation by Positron Lifetime (PALS) and DSC — •Guenter Dlubek1, Gisela Pompe2, Juergen Pionteck2, Konrad Petters3, Christian Taesler2, Frank Redmann2, and Reinhard Kause-Rehberg2 — 1ITA Inst. of innov. Technol. GmbH, Koethen, Aussenstelle Halle, Wiesenring 4, D-06120 Lieskau — 2Institute of Polymer Research, Hohe Strasse 6, D-01069 Dresden — 3Martin-Luther-University, Dep. of Physics, D-06099 Halle/S
PALS and DSC experiments were performed for studying interdiffusion in a particle-matrix system of two miscible polymers. The system was prepared by mixing and pressing powders of the two polymers. Two systems were investigated: (i) styrene-maleic anhydride-copolymer containing 24 wt-percent maleic anhydride (SMA-24, particle) and poly(methyl methacrylate) (PMMA, matrix), (ii) polyvinylchloride (PVC, particle) and poly (n-butyl methacrylate) (PnBMA, matrix). From both, PALS (the o-Ps intensity I3) and DSC experiments, the mass fraction of the interphase modified by mutual diffusion is estimated for different annealing temperatures and times.